Frequency-selected enhancement of high-order-harmonic generation by interference of degenerate Rydberg states in a few-cycle laser pulse

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	Frequency-selected enhancement of high-order-harmonic generation by interference of degenerate Rydberg states in a few-cycle laser pulse
	Chen, JG ; Wang, RQ ; Zhai, Z ; Chen, J ; Fu, PM ; Wang, BB ; liu, WM
刊名	PHYSICAL REVIEW A
	2012
卷号	86 期号:3
关键词	SOFT X-RAYS NONLINEAR OPTICS RARE-GASES MOLECULES FIELD ORBITALS DYNAMICS
ISSN号	1050-2947
通讯作者	Chen, JG: Taizhou Univ, Dept Phys & Mat Engn, Taizhou 318000, Peoples R China.
中文摘要	We demonstrate that the frequency-selected enhancement of high-order-harmonic generation (HHG) can be achieved by a few-cycle laser pulse interacting with a coherent superposition state, which is prepared by the ground state and two degenerate Rydberg states. The degenerate states have the same orbital radius and hence have a large overlap in the electronic density distribution. By controlling the relative phase between the two degenerate states, the constructive or destructive interference of them can markedly change the initial density distribution of the Rydberg electron, thereby we can manipulate the characteristics and the conversion efficiency of HHG. Specifically, a significant enhancement in the continuous harmonics near HHG cutoff can be obtained, hence an intense isolated pulse with a duration less than 100 attoseconds is straightforwardly generated. On the other hand, since there exists a specific dependence of the harmonic efficiency on the relative phase of the two degenerate states, one can expect that the relative phase may be probed by examining the corresponding harmonic intensity. In practice, we may apply a weak static electric field in the whole dynamic process to obtain an asymmetry electron density distribution at a large radius; hence similar HHG results can be obtained.
收录类别	SCI
资助信息	NKBRSFC [2011CB921502, 2012CB821305, 2009CB930701, 2010CB922904]; NSFC [10934010, 60978019, 11074296, 11074026]; NSFC-RGC [11061160490, 1386-N-HKU748/10]; Natural Science Foundation of Zhejiang Province [Y6110578]
语种	英语
公开日期	2013-09-17
内容类型	期刊论文
源URL	[http://ir.iphy.ac.cn/handle/311004/38485]
专题	物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式 GB/T 7714	Chen, JG,Wang, RQ,Zhai, Z,et al. Frequency-selected enhancement of high-order-harmonic generation by interference of degenerate Rydberg states in a few-cycle laser pulse[J]. PHYSICAL REVIEW A,2012,86(3).
APA	Chen, JG.,Wang, RQ.,Zhai, Z.,Chen, J.,Fu, PM.,...&liu, WM.(2012).Frequency-selected enhancement of high-order-harmonic generation by interference of degenerate Rydberg states in a few-cycle laser pulse.PHYSICAL REVIEW A,86(3).
MLA	Chen, JG,et al."Frequency-selected enhancement of high-order-harmonic generation by interference of degenerate Rydberg states in a few-cycle laser pulse".PHYSICAL REVIEW A 86.3(2012).